Vidalista 40 tablet is a useful medicine for men. This drug treats PAH by relaxing the blood vessels in the lungs to allow blood to flow more easily. Take this medicine about 40-50 minutes before sexual activity. The drug shows its effect in about half an hour after entering the body. Do not mix this medicine with other medicines or add anything to the taste of the medicine. Do not take more or less than prescribed by your doctor or take it more often.